Spring expansion bend



Jan. 26, 1937. J,Y NYDE'R,JR 2,068,856

SPRING EXPANSION BEND Filed Nov. 21, 1.933

Patented Jan. 26, 1937 UNITED STATES PATENT orrlcs seams nxrmsron am I John Y. Snyder, In, Elisabeth, N. 1., mimiat Standard Oil Development Company. a corporation of Delaware Application November 21. 193:, serial no. ssaoas 2 Claims. (01. ass-ac) This invention relates to an improved pipe expansion bend. The invention will be fully under-- Fig. 2 is an end elevational view oi the device.

looking along the line 11-11 01 Fig. 1;

Fig. 3 is a bottom plan view of the device;

1 Flg. 4 is a side elevational view of a modified form of the device, and Fig. is an end elevational view looking along the line V--V of Fig. 4;

Referring particularly to the. drawing, reference numerals I and 2 designate respectively the 15 ends of a pipe-line. The pipe ends I and 2 are provided with suitable flanges I and I respectively.

A spring expansion bend-is disposed between the pipe ends I and 2. The spring expansion bend comprises a body portion I of tubing which is 20 bent to form one or more turns of a coil. The

body portion 1 is provided with ends I and I car:- rying flanges II and II respectively which are secured in any suitable manner to the pipe end flanges land 5 respectively. The spring expan- 5 sion bend is installed in the pipe line at right anglesto the line 01 the pipe. The body portion 1 is in the shape of -a helical spring with its ends 3 I and I in alignment with each other, and extending substantially parallel with the longitudi- 30 nal axis or the helical body portion, the spring bend of the body portion being disposed laterally oi the ends and I as can be'clearly seen in Figs. 1 and2. TheflangedpipeendsIandIai-esecuredtotheflanges "and II otthespringex-.

.35 pension bend by suitable bolts II or thelike' The body portionot the spring expansion bend is spiral in form.

Upon convergence or divergence oi the pipe ends I and 2 due toexpanslon orcontraction re- .40 spectively oithepipeline, thespring expansion bendiscausedtodecreas'eorincreaseiniength respectively according to the principle of ahelical. spring. ,Bytheconstruction describeda largeamountoiexpansionmaybetakenbyons pipe-bend with low resultant stresses in the material oi the bend.

Referring to Figs. 4 and 5 a modified form oi bend isshown comprisingabody portion II inthe shape oi one or more turns of a coil. The body 5 portion II has ends I] and II carrying flanges II and II, respectively, secured to the pipe end flanges I and I respectively. Portions II and 24 of the body portion II from which the. ends I I and II respectively protrude extend inwardly from the coil to substantially the center of the perimeter of the body portion.

Various changes may be made within the scope oi the appended claims in; which it is desired to claim all novelty inherent-in the invention as broadly as the prior art permits. I claim:

- 1. ma pipe line subject to variation in length due to temperature changes, a joint for two adjoining sections of the line consisting of a tubular body portion in the form 01' a portion of a "helical coil having an axis substantially parallel to that of the adjoining pipe sections, end portions on said tubular body portion, at the perimeter thereof, extending outwardly therefrom in opposite directions, parallel to the axis 01' the body portion and adapted to engage the respective ends 01' the adjoining pipe sections, whereby variation of the length of the pipe line is compensated by an increase or decrease in the pitch oi helical coil.

2. In apipe line subjectto variation in length due. to temperature changes; joint for two adjoining section-sot theline consistingofatubular body portion in the form of a helical coil, having an axis concentric with that of the adjoining pipe sections,endportionsonsaidtubularbodyportion'extending outwardly in opposite directions alongtheaxis oisaidbody portionan'dadapted to engagetherespectiveendsoitheadioining. pipe sections whereby variation of the length of 40 thepipelineiscompensated byacorresponding' changeinpitchoi-thehelicalcoil 1 Y oint Y. mom. a. 

